The torch / tip combo you list will melt boro just fine.
It will be hotter. But it will also boil your color a lot faster. Pre-mix is a little more touchy about flame atmosphere than surface mix. Until you learn the sweet spot, be careful with crayon colors and pastels.
I worked with a premix torch for the first year. National 8M with HTC3 tip. Moved up to a Red-Max a couple of years ago. I like the surface mix better!
I still use the pre-mix for shows, but the Max fits the pieces I make while being gentle on the colors. It is also a lot easier to work Dicro with a surface mix.